FDM 增材制造 BST/PVDF-ABS 复合材料的正交实验研究

Barium-strontium titanate (BST)/polyvinylidene fluoride (PVDF)-based functional composites have attracted extensive attention due to their excellent dielectric tunability and machinability properties. However, it is difficult for BST/PVDF composites to form complex shapes by traditional processes, which greatly limits their application. In this paper, BST/PVDF-Acrylonitrile butadiene styrene ternary copolymer (ABS) composites were prepared by Fused Deposition Modeling (FDM) additive manufacturing method, and the influence of process parameters on the volume change rate, density, dielectric and mechanical properties of the materials was explored through orthogonal experimental design. The results showed that when the printing temperature is higher than 240℃, the dimensional stability deteriorates and the relative density decreases, and the importance of process parameters was in the order of printing temperature> platform temperature > printing speed. It was found that, under the optimized FDM processing parameters with the printing temperature of 240℃, the platform temperature of 100℃ and the printing speed of 30 mm/s, BST/PVDF-ABS composite has the best dielectric and mechanical properties, with the dielectric constant of 11.20, the dielectric loss of 0.0138 and the tensile strength of 35.03 MPa. This paper elucidates the mechanism of the influence of printing parameters on dielectric properties, enriches the preparation process technology of ceramic/polymer functional composite materials, and provides a technical basis for the design and preparation of structure-function integrated devices.